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o l1 www5@ Patented Aug. 8, 1939 L UNITED STATES RATE EXTENSION PUNCH Clair D. Lake, Binghamton, N, Y., assignor to` International Business Machinesv Corporation, New York, N. Y., a corporation of New York Application December 2s, 1937, serial No. 132,058

16 Claims.

adapted to punch cards of the well-known Holy lerith type.

The present invention is directed to the simplifying of punching a large number of record cards whereon a large number of the card columns are to receive perforations representing data peculiar to each individual card. Heretofore such data were punched by the laborious and time consuming method of manually punching each column of each card.

An object of the invention is to provide mechanical means controlled by a single manipulative means simultaneously to set up a plurality of values which may be read out step by step and punched in a plurality of card ilelds.

Another object of the invention is to provide a large number of value carrying elements each of which elements is provided with a plurality of readable elements automatically to control a punching machine.

A further object is to provide a single manipulative means which automatically shifts the circuits from certain selected values from certain columns to other columns.

Further objects of the instant invention reside in any novel feature of construction or operation or novel combination of parts present in the embodiment of the invention described and shown in the accompanying drawings whether within or without the scope of the appended claims and irrespective of other specific statements as to the scope of the invention contained herein.

In the drawings:

Fig. 1 is a. plan view of the reproducing punch and the rate extension keys.

Fig.- 2 is a plan view of the reproducing punch.

Figs. 3 and 4 illustrate the card feed and interlock.

Fig. 5 is a view in side elevation of a portion of the punch mechanism, partly broken away to show some of the structure.

Fig. 6 is a sectional view through the punching mechanism.

Fig. 7 is a sectional view illustrating the brush shifting and controlling device.

Fig. 8 is a. detail view showing the operation oi' the last column contacts by the card carriage.

Fig. 9 is the circuit diagram of the machine.

Fig. 10 is a view in front elevation (partly broken away) of the circuit selector mechanisms.

Fig. 11 is a sectional view taken longitudinally through the circuit selector looking toward the rear of the machine.

Fig. 12 is a sectional viewtaken on line |2-I2 (Fig. 10) looking in the direction of the arrows.

Fig. 13 is a detail view of the key bar latches.

Fig. 14 is a sectional view taken on line iI-il (Fig. 10) looking in the direction of the arrows.

Fig. 15 is a top plan view of the key locking mechanism.

Fig. 16 is a detail view showing the drive motor and the mechanism for lowering and raising the selected value plate.

Fig. 17 is a plan view of the circuit selector contacts.

Fig. 18 is a detail view of the cam and cam arm for operating the value plate lowering and raising frame.

Fig. 19 illustrates one of the value plates.

Fig. 20 is a fragmentary sectional view taken l on line 2li-20 (Fig. 19).

Figs. 2l and 22 are detail views showing value plate tray locking and unlocking arrangement.

Fig. 23 illustrates a typical record card.

Fig. 24 illustrates the schedule of residential and commercial rates.

Fig. 25 is a dlagrammatical view of the plugboard showing a typical plugging arrangement.

As stated above, the duplicating punch mechanism is substantially the same as that disclosed in the patent to Lee and Daly No. 1,976,618. To such a punch mechanism has been connected by a cable a circuit selector including a group of selector keys l (Figs. 1 and 10).

The blank cards 3 are fed manually into the machine on a guide plate 4 and under a normally open card pressure plate l (Figs. 1, 2, 3 and 4). This plate is shown in its open position at 1' (Fig. 3). When the card is in position the plate 1 is closed, whereupon a circuit (to be described later) is closed to bring into operation mechanism to feed the card to the punching position. This mechanism includes a picker knife 2 (Figs. 3 and 4) which at the'proper time is moved toward the left. At the same time a card carriage 6 is moved to the right (Fig. 1) to a position to receive the card 3 when the picker 2 reaches the end of its leftward movement. The card is then punched column by column according 'to the punch selector circuits set up, the carriage 6 moving to the left step by step. When the punching of the card is completed and the carriage 6 has reached the end of its leftward travel, the newly punched card 3 is automatically removed and the operation is completed.

The punches 5 (Fig. 6) may be operated normally by means of keys S or they may be controlled by a duplicator in accordance with the perforations of a previously punched master card I0. This master card is supported in a carriage 5 which is secured to the carriage 6 and therefore moves therewith.

The punches 5 may also be operated under the control of electrical circuits illustrated in Fig. 9, which circuits are set up under the control of the selector keys I in a manner to be described later.

It was stated above that the leftward movement of the picker knife 2 (Fig. 4) occasions a movement to the right of the card carriage 6. This movement is effected by the following described mechanism:

Secured to the picker knife 2 is a bracket formed as shown in Figure 3 and having one of its ends secured to a rod I3 slidably mounted in a tube I2 suitably supported on the base of the machine. The bracket I| projects through a longitudinal slot in the tube I2. Near its lefthand end (Fig. 5) the rod I3 is provided with a. rack portion Il meshing with a pinion |5 secured to a shaft I1 upon which shaft is mounted the usual coil spring for returning the rod I3 and picker knife 2 to their normal right-hand position, as is fully disclosed in the patent to Lee and Daly No. 1,976,618.

A gear |6, also meshing with the rack portion I6 of rod I3, is mounted on a shaft 23 and has fixed thereto a clutch comprising a member i9 provided with a single tooth 20 laying in the plane of a pawl 2| pivotally carried on an arm 22 fixed on shaft 23. Secured on the opposite end of the shaft 23 is a gear 24 (Figs. 2 and 6) meshing with teeth on the lower edge of a rack 25 forming a part of the card carriage 6.

For the purpose of controlling the clutch 20-2I a cam 26 pivoted at 21 (Fig. 5) is provided with a face 20 co-operating with a pin 29 projecting from the tail of pawl 2|. When the rod |3 and the picker knife 2 are in their extreme righthand positions a block 30 secured to the left-hand end of rod I3 strikes a pin 3| projecting from the cam'26 rocking said cam clockwise to disengage the pawl 2| from the tooth 20 of the member |9.

A motor |51 mounted on the under-side of the machine base provides the power to feed the card from beneath the plate 1 (Fig. 1) to the carriage 6, and to return the carriage 6 and master card carriage 9 to their normal starting positions. The motor |51 through a clutch connection |58 (Fig. 6) drives a worm gear |59 meshing with a gear |60 fast on a shaft |6|. Also secured to the shaft 6| is a clutch element |62 (Fig. 5) adjacent a gear |63meshing with teeth on the under-side of rod I3.

A disk |64 secured to the gear |63 has pivoted thereon at |65 an arm |66 having a tooth |61 adapted to cooperate with the clutch element |62. A link |69 connects the free end of the arm |66 to a toggle plate |60 pivoted at |10 on the disk |64. The free end of the toggle plate |68 is connected at |1| to a rod |12 slidably mounted in a pin |14 rotatably mounted on the disk |64. A spring |13 urges the toggle plate in a counterclockwise direction about its pivot|10. 'I'he construction of the parts rst described is such that the spring |13 holds the tooth |61 either in or out of engagement with the clutch element |62.

In order to effect a clutching action between the shaft |5I and the gear there is provided a magnet I (Figs. 5, 6 and 9) which, when energized in a manner to be later described, rocks its amature |16 and an arm |11 secured thereto clockwise. At this movement the arm |11 engages a pin |19 in the clutch arm |66 and engages the tooth |61 with the clutch element |62. When the motor |51 is now energized, in a manner fully set forth later, the gear 63 is driven through substantially one counter-clockwise rotation.

This rotation of the gear |63 shifts the rod I3 to its extreme left-ward position carrying the picker knife 2 (Fig. 4) therewith to feed the previously inserted card to the carriage 6, which has, by the clockwise rotation of gear I6, shaft 23 (Fig. 5) and gear 24 (Figs. 2 and 6), been moved to its extreme right-hand position to receive the card.

Near the end of the counter-clockwise rotation of the gear |63 a tail |19 on the clutch arm |66 strikes a projection |80 on a plate |0| suitably secured to the machine to effect disengagement of the tooth |61 from the clutch |62. Upon disengagement of the clutch |62|66 the rod I3 is free to return toward the right to its normal position under the influence of a coil spring attached to the shaft I1 as is fully disclosed in Patent No. 1,772,186.

The carriage 6 is now shifted step by step toward the left to carry the card 3 column by column past the punches 5 (Fig. 6), there being a supplemental coil spring provided to effect this movement under the control of a well-known escapement mechanism.

This escapement mechanism is of the type disclosed in the patent to C. D. Lake et al. No. 1,914,263 granted June 13, 1933, to which reference may be had for a full understanding of this mechanism.

The trip magnet |15 (Figs. 6 and 9) is energized in the following manner: At the end of the leftward movement of the carriage 6, that is, just after the last column of the card has been punched, a projection |92 (Fig. 8) secured to the carriage rack 25 strikes and rocks counter-clockwise a lever |93 pivoted on a xed part of the machine. This movement of the lever |93 opens contacts |9| and closes contacts |94. Opening of contacts |9| disengages a brush magnet 63 (Figs. 7 and 9) permitting contacts |99 to close. At this point, if the operator has placed a new card under the plate 1 (Figs. 3 and 4), contacts |95 (Figs. 6 and 9) are closed and a circuit is established from line 52, contacts |94, contacts and |95, magnet |15, contacts |96 to line 55. Thus energized the magnet |15 engages the clutch |62|66 (Fig. 5). In addition to engaging this clutch the armature |16 also operates an arm |65 (Fig. 6) attached thereto. This arm opens contacts |36 and closes contacts |90.

Opening the contacts |36 opens the circuits to the brush magnet 03, and to the punch magnet 49 making it impossible to operate these devices while the carriage is being returned.

Closing contacts |90 establishes a circuit from line 52, contacts |90, motor |51, contacts |98 to line 55. The motor |51 now drives the gear |63 to feed the newly inserted card 3, and returns the carriage 6 to receive said card.

The contacts |36 are held open and the contacts |90 are held closed by a latch |91, an ear |60 (Fig. 6) of which is adapted to be struck by a bent plate |69 (Fig. 5) secured to the gear |63 near the end of its rotation. When this occurs the contacts |36 again close and contacts |90 open stopping the motor |51.

It may be observed that until the operator places a card under the plate 1 and closes this plate the contacts |95 remain open, maintaining the circuit through the trip magnet |15 open,

4 matically on the return stroke of the picker knife 2 `in the following manner:

A latch ||8 pivotally supported on the under sideof the plate 4 is urged by a spring into cooperative relattlon with a projection ||2 on the plate 1 to hold this plate latched in its closed position. A bypass pawl |I3 pivotally supported bya bracket I|4 secured to the plate 4 extends downwardly into the path of the bracket When the bracket travels toward the left (Fig. 4) it wipes by the pawl I I3 without affecting the latch ||8. On its return stroke, toward the right, the bracket strikes the pawl ||3 which being in contact with an ear ||5 of the latch ||8 rocks said latch counterclockwise (Fig. 4) to release the plate 1 which is immediately raised by a spring ||6.

The punches 5 are normally held in their raised position by individual coil springs 38. Interposers 39 (Fig. 6) supported at their righthand ends on a cross-member 48, rest on the upper ends of the punches 5. A plate 4| prevents further upward movement of the interposers 39 and consequently of the punches 5.

Depression of a key 9 rocks a bellv crank 45 counterclockwise, which, through a pin and slot connection 41, slides the corresponding interposer 39 toward the left to bring the interposer beneath a projection 44 on an actuator plate 42 so that upon depression of said actuator plate, the selected interposer 39 and consequently the corresponding punch 5 will be depressed.

In order to operate the punches a magnet 49 (Fig. 5) is provided which when energized attracts its armature 58 and through a link 53 rocks a bell crank 54 counter-clockwise. The bell crank by a link 56 rocks the actuator'plate 42 downwardlyto operate the selected punch 5.

The magnet 49 is energized upon depression of a key 9 as follows: Leftward movement of any one of the interposers 39 rocks a bail counterclockwise raising a link 9| closing contacts 95. These contacts 95 are in series with the punch magnet 49 (see circuit diagram Fig. 9) and upon their closure a circuit is established from line 52, contacts |36, contacts 95, punch magnet 49, magnet 41, wire 48 to line 55, thus energizing the punch magnet 49 Whenever a key 9 is depressed.

When the punch magnet 49 operates its armature 58, a projection 92 on the link 53 rocks the link 9| to permit the contacts 95 to open.

Each time a key 9 is depressed an escapement mechanism is operated under the control of the bail 98 to permit the carriage to escape to the next column.

After the last column has been punched the carriage closes contacts |94 as above described. In additionl to the function set forth above. these contacts also cause the energization of a magnet |99 (Fig. 9) which controls the operation of an automatic card ejecting mechanism.

This mechanism is disclosed in the patent to J. M. Cunningham, No. 1,916,965, granted July 4, 1933, to which reference may be had for a complete understanding of the construction and operation of the card ejector device. The magnet |99 (Fig. 9) closes contacts 28| in the trip magnet circuit to complete the circuit through the trip magnet |15.

The keys 9 may be operated by selector magnets 68 under the control of a pattern or master card 8 in a well-known manner. The master card is carried in a carriage 8 and is sensed as it passes between sensing brushes 68 (Fig. 7) and a contact roll 69 concomitantly with the leftward passage of the card 3 past the punches 5.

When the last column in the new card 3 (Figs. 1 and 2) has beenpunched and the carriages 6 and 8 are to be returned toward the right (Fig. '1) it is necessary to drop the brushes 68 out of contact with the card I8 in order to prevent damage to the card and brushes This is accomplished by de-energizing the brush magnet 83.

It will be recalled that just after the last column is punched the contacts |9| (Figs. 8 and9) are opened by the lever |93 (Fig. 8). These conl tacts are in series with the brush magnet 83, thus de-energizing this magnet when the card carriage is in the last column position which is to the extreme left (Fig. '1).y De-energization of the magnet I3 allows its armature 88 (Fig. '1) to rock counter-clockwise thrusting the link 11 toward the right and rocking the arm 18 clockwise thus lowering the brushes 68. As soon as the carriage commences its movement toward the right the contacts |9| close, but the brush magnet circuit it held open at the contacts |36 (see Figs. 6 and 9), until the carriage arrives at its extreme right-hand position. At this point the latch |81 (Fig. 6) is tripped permitting contacts |36 to close energizing the brush magnet 83 (Fig. 7) which raises the brushes 68 into contact with the card.

The contacts 81 are open when there is no master card in the master card carriage. These contacts are in the brush magnet circuit holding this magnet de-energized until a card is placed in the carriage and the door 84 closed pressing the plunger 86 downwardly to close the contacts 81. A latch holds the door closed until released manually.

` When a master card is being sensed and the punches operated under the control of the pattern of the master card the circuit through the selector magnets 68 is traced as follows with reference to Figure 9: Line 52, contacts |36, manual switch 88 closed when duplicating from a master card, cam operated contacts 89 (described later), wire 98, common brush 14, contact roll 69, brush 68 through hole in card, corresponding selector magnet 68 to line 55. The magnet 68 operates a lever 6| which Ain turn operates the corresponding numeral key 9 causing the punch to function in the manner set forth above.

The above briefly described punching device effects punching of data common to all cards under the control of a pattern card and also effects punching of data which varies with each individual card under the control of manually operable keys. 1

The punch selector magnets 68 (Fig. 9) may also -be selected under the control of the rate extension keys (Figs. '1., 10, 11, 12 and 14). Depression of one of these keys selects a plurality of columnar circuits. The circuits are then sensed column by column by means of a read-out strip 228 (Figs. 1, 2 and 9).

The selector mechanism 'is carried in a framework comprising a base 282 (Figs. 10, 11, 12 and 14), side frames 283 and 284 secured to the base and formed at the top by cross members 285, 286 and 281. The entire mechanism is enclosed in a casing 288 on top of which is supported a keyboard in which are mounted the rate extension keys The keys are slidably mounted in a bottom plate 203 (Figs. 11, l2 and 14) and a top plate 2|0, the latter plate being supported on crossbars 2|| extending between the side frames. Associated with each of the keys I is a bell crank 2|2, which bell cranks are pivotally mounted on rods 2|3 set into cross-bars 2|4 extending between the side frames. The downwardly extending arms of the bell cranks 2|2 are embraced by notches in the upper edges of slides 2|5 supported on rods 2li and 2|1. These rods are supported in cross-bars 205 and 201 respectively.

-By referring to Figure 14 it can be seen that depression of a key I acting through the associated bell crank 2|2 moves the corresponding slide 2|5 toward the left. At this movement of the slide a projection 2|. on the right-hand end thereof wipes by the end of a spring pressed detent bar 2|! supported between a. pair of arms 220. As soon as the projections 2|8 have passed the end of detent 2|! a spring 2| restores the detent to its normal position. thus holding the slide 2|5 in its moved position as indicated in Figure 14. In this condition the operated key ls held in its depressed position until released later in the operation by mechanism later to be described.

The usual ball interlock 222 is provided to prevent depression of more than one key I at a time.

The arms 220 supportingthe detent bar 2 I 6 are pivotally mounted on a rod 223 mounted in brackets 224 secured to the under side of a plate 225 extending between the side frames. When the detent bar 2|! is rocked counter-clockwise to release the slide 2|5 a spring 23| restores said slide toward the right to its normal position.

Each of the keys I controls a value plate 232 upon which are mounted a plurality of digital value bars 233 (see Figs. 14, 19 and 20). The plates 232 are mounted in a frame or tray comprising side members 234 and 235 (Fig. 14) formed at their ends by members 236 and 231 (see also Fig. 21) 'I'he tray is conveniently removable from the machine for the purpose 0f changing the value plates 232 or another tray wherein the plates 232 have different values assembled thereon may be inserted. The tray rests on bars 233 and 23! secured on frames 240 and 24| mounted on the base 202 and extending longitudinally of the machine.

Referring now. to Figure 12 the value plates are normally held in their raised positions by pairs of segments 242 and 243 pivoted on rods supported in a cross-bar 244. Each of the slides 2|5 is provided with a hook projection normally in engagement with the end of one arm 246 of the segment 242. Projections 241 on the value plates rest on arms 243 0f the segments 242 and 243, thus holding the value plates in their raised positions.

When a key is depressed it shifts its slide 2|5 toward the left releasing the arm 246 and segment 242 to the action of spring 23| which immediately rocks the segment 242 counter-clockwise. to the segment 242 meshing with segment 243 the latter segment is rocked clockwise. This movement of segments 242 and 243 lowers the value plate 232 and brings the rounded end of an arm 246 of the segment 243 beneath the upper wall of a channel member 250. The member 250 is then lowered (by mechanism presently to be described) further rocking the segments 242 and 243 which press the value plate downwardly the full extent of its movement in which position the parts are shown in Figure 14. In this position of the plate 232 it may be seen that each of the value Due 19 and 20).

bars 233 has depressed an associated bar 25| a distance commensurate with the digital value; represented by the length of the associated value bar 233.

Each of the bars 25| (Fig. 11) is pivotally mounted on one arm of each of three bellcranks 252 and on one arm 0f bell crank 253 These bell cranks are pivoted on rods 254 mounted on brackets 255 bent upwardly from the bars 238 and 239 (Fig. 14). In Figure 12 all of the bars 25| are shown, but in Figure 14 only a few of these bars are fully shown, the remainder being omitted for the sake of clearness.

The other arms of the bell cranks 252 and 253 are connected together by a link 256. This arrangement of the parts insures that the bar 25| will receive a parallel movement regardless of the value plate 232 depressed, that is, if a plate 232 is depressed at either end or in the center of the bar 25|.

The lower arm of bell crank 253 carries a block of insulating material 251 (see Fig. 14), upon which is mounted a pair of brushes 258 and 259 electrically connected together. These brushes straddle a contact segment 260 on one side of which is mounted a plurality of spaced contacts 26| representing the digits 0 to 9 inclusive. A common contact strip 262 is mounted on the other side of the segment 260.

Thus it can be seen that when a value bar 233 (Fig. 14) whose length represents the digit 9,

operates the bar 25| (Fig. 11), the bell crank 253 will be rocked counter-clockwise to bring the brush 253 into contact with the "9 contact 26|. A spring pressed aliner 263 carried by an arm 264 pivotally carried by a projection 265 of bell crank 253 serves to aline the brush 256 with the particular contact 26| to which it has been moved.

The contacts 26| are wired through a cable 226 (Fig. l) to a plugboard 221 (Fig. 2) where they are plugged to a read-out strip 228 which will be fully described later in connection with the circuit diagram.

The illustrative embodiment of the instant invention discloses that twenty-two value bars 233 may be assembled on each value plate 232 (Fig.

19) representing an equal number of columns to be punched on the card. Each of these bars 233 controls or operates a bar 25| to set the corresponding contacts 256 there being a commutator 260 for each of the value bars 233. It is to be understood that the value plates 232 may be extended to include any desirable number of value bars 233 without departing from the spirit of the invention.

The value bars 233 are removably assembled on the plate 232 by inserting the end of the bar under the comb 266 of a spring clip 261, engaging a notch 268 in the end of the bar with a projection 269 on the plate 232 Iand then engaging a notch 210 in the side of the bar with a projection 21| on the lower edge of the plate 232 (see Figs. Thus a bar 233 of any digital value or length may be assembled in any columnar positon on the plate 232. The set-up may be quickly and easily changed at will.

The mechanism for lowering the selected value plate 232 includes a motor 211 (Figs. l2 and 16) mounted on the base 202 of the machine. By means of worm gears (not shown) the motor drives a shaft 218 (Figs. 16 and 18) journaled in brackets 219 and 200 secured to the base 202. A gear 23| free on the shaft 218 and driven through a clutch meshes with a gear 262 pinned on a shaft 203 also journaled in frames 219 and 230.

lil

Also pinned on the shaft 283 is a pair of cams 284 and 285 (Fig. 18) co-operating with rollers 288 carried by a cam arm 281 pinned to a shaft 288 to which shaft is also fast a lever 289. One end of the lever 289 forms a segment 298 which meshes with a segment 29| on one arm of a lever 292 pivotally supported at 293 on the bracket 219.

The ends of the levers 289 and 292 opposite the segments 298 and 29| arev bifurcated and embrace studs 294 projecting from rods 295 mounted to slide vertically in brackets 298 secured to frames 283 and 284. Also securely mounted on the rods 295 are blocks 291 which pivotally carry arms 298 to which arms is secured the channel bar 258 (see also Fig. 14).

As viewed in Figures 12 and 16, the motor 211 when energized as set forth below, rotates the shaft 283 and cams 284-285 in a clockwise direction which movement rocks the cam arm 281, `shaft288 and the lever 289 clockwise. Due to the meshing of segments 298 and 29| this rocks the lever 292 counter-clockwise. By examination of Figure 16 it may be seen that clockwise movement of lever 289 and counter-clockwise movement of lever 292 slides the rods 295 downwardly equidistantiy. At this movement the arm 249 of the selected segment 243 (Fig. l2) which as- Sumed a position beneath the upper Wall of the channel bar 258 is rocked further clockwise rocking the segment 242 further counter-clockwise lowering the associated value plate 232 to the position in which it is shown in Figure 14, thus s setting each of the circuit selecting brushes 258- x259 for which there is a value bar 233 assembled in the value plate 232.

The gears 28| and 282 and the cams 284-285 are driven through a clutch which eiects one-half of one complete rotation of the cams 284-285. The clutch is then disengaged holding the chan- 1 nel bar 258 in its lower position to permit reading out and punching the values represented by the circuits selected through brushes 258-259. After the last circuit or column has been punched the clutch is again operated to drive the cams 284- 285 another half rotation thus completing a full rotation of the cams and raising the channel bar 258 to restore the depressed value plate 232 and torelease the depresed key` I.

The clutch is described as follows: A disc 299 fast on the shaft 218 has a notch in its periphery `adapted to be engaged by a clutch pawl 388 pivotally carried by anarm 38| free on the shaft 218 but secured to the gear 28|. A spring 382 urges the pawl 388 into engagement with the notch on disc 299 but is normally restrained and the pawl held in ineifective position by the armature 383 of arpair of clutch magnets 384. At the proper time (as fully set forth later in the circuit description) the magnets 384 are energized attracting the armature 383 and permitting the spring 382 to engage the clutch pawl. The lgear 28| then receives one complete rotation being arrested by the armature at the end of said rotation. The ratio of the gears 28| and 282 being two to one the latter gear receives but one-half rotation to lower the selected value plate 232. After the last column represented on the value plate has been punched the magnets 384 are again energized thus engaging the clutch which effects the second half of the rotation of gear 282 and cams 284-285 to'restore the depressed value plate.

Refering now to Figures 12 and 14, the lower wall ofthe channel bar 258 on its upward movement picks up the arm 249 of segment 243 rocking this segment counter-clockwise vthus rocking the segment 242 clockwise slightly past normal position so that the arm 248 is in position to be the right to its normal position and raises the depressed key to its undepressed position. As the slide 2|5 moves to the right the projection 245 assumes its position beneath the end of the arm 248 thus retaining the segments 242 and 243 in their raised positions.

The circuit selecting brushes 258-259, bell cranks 252-253 and the bars (Fig. 11) are positively restored by a restoring bail 381 carried by arms 388 pivotally mounted on a stud 389 projecting inwardly from the frames 248 and 24|. The bail 381 is operated by a stud 3|8 carried near the lower end of one of the rods 295 (see also Fig. A12) which stud, as the rod 295 moves upwardly on its restoring movement, engages and rocks counter-clockwise` an arm 3|| connected to one arm 388 by a bail 3|2. Movement of the stud 318 is therefore transmitted to the bail 381 rocking said bail counter-clockwise againstthe ends of the links 256 to restore these links and their associated mechanism from their several selected positions to their normal position as shown in Figure 11.

Referring to Figures 14 and 16 it maybe observed that tails 3|3 on the arms 298 are held against the lower side of blocks 291 by springs 3 4. The purpose of this construction is to eliminate the possibility of breakage or damage in the event a value plate 232 sticking. Should this occur the channel bar 258 and its supporting arms 298 would becammed clockwise against the tension of springs 3|4 without damaging any of the parts.

Referring now to Figure 9 a description will be given of the circuit diagram pertaining to the operation of the rate extension part of the device, the punch circuit having been described above.

It was' set forth above how depression of a key i (Fig. 14) shifts its slide 2|5 toward the left. Pivotally mounted on a rod 3|5 supported in brackets 3|6 secured to the cross-bar 285, is a bail 3|1 having its upper edge in the paths of all of the slides 2|5. A projection 3|8 (see also Fig. 10) of the bail 3|1 carries an insulating disc 3|9. As viewed in Figure 14 leftward movement of the slide 2|5, by thedepression of a key`l, rocks bail 3|1 counter-clockwise closing a pair of contacts 328 establishing a circuit from line 52, contacts 32|, contacts 328, contacts 322, clutch magnets 384, wire 48 to line 55. Energization of the clutch magnets 384 attracts armature 383 (Fig. 16) permitting spring 382 to engage clutch pawl 388 with clutch disc 299. At the same time closure of contacts 328 energizes the drive motor 211 the circuit extending from line 52, contacts 32|, contacts 328, wire 323, motor 211, wire 324 to line 55. 'I'he motor 211 now rotates the disc 299 through one complete rotation, which, as set forth above, rotates cams 284-285 one-half rotation to lower the channel bar and therethrough the selected value plate.

Shortly after the beginning of the rotation of the cams 284-285 the contacts 322 (Fig. 9) are opened and a pair of contacts are closed by a cam 328 (see also Fig. 12), fast on the shaft 283. The opening of contacts causes deenergiza- 

